Mascara
Longer eye lashes will make eyes look bigger, so choose a lash-lengthener mascara and use it on both upper and lower lashes,

Eye liner
Outlining the eyes with a dark eyeliner will enhance the effect of the mascara. You can try making a line of tiny dots close to the roots of the eyelashes and then using your finger, a fine brush or a cotton bud to blend them into a line, Draw this out towards the outer corner of the eye and bring the upper and lower lines together just beyond their natural joining point to make the eye seem larger.

Eye shadow
Use darker shades from the centre of the eye lid and extend out and up towards the brow, ending above the outer angle. This will make the eye appear larger. Add a touch of a lighter, pearlised colour on the inner part of the lid and at the inner corner to add light and brightness. Finally, drawing a line inside the lashes, using a kohl eye pencil will make the eye look even wider.


Two more tricks:
Careful plucking of the eyebrows from underneath can add expression and make the lid area larger, as will using an eyelash curler.

http://www.hellomagazine.com/healthandbeauty/makeup/201105275477/making-small-eyes-look-bigger/

(Source: eye-make-up)